Braking mechanism



Nov. 22, 1932. F. TURZICKY BRAKING MECHANISM Filed Aug. 19, 1929FFAMMMML i l/ III jzdaW; fim cab Zar a z'cy 3 W 44% versely when thebrake strapis contracted,

as presently described, it moves toward the brake drum 1 throughout itscircumference being guided in its movementby the movement of thestirrup12 one the bar 13, the stirrup lZ'beingfixedly secured to thebrake strap ill. The brake shoe is desirably inelusive of the brake pador lining lO'an'dt'he' resilient strip of metalll which v. arriesthelining. Each of the two closely approached ends of the resilient strip11 carries a yoke 14 which is in the form of a bifurcated post.

These posts constitute members of flexible connections betweenthe-"brake shoe" andthe' Qactuating mechanism;- In the embodimentofitheiihvention illustrated, this, actuating mechan sm is 'incluslve ofinterlorly threaded 1 aligned cylindricalabutment sleeves 15,.

which are snugly received Within circnlarl V lioles formed? in the bodyportion 6 of'the Easing, the Se sleeves being slidable Within theseholes and with respect to said casing,

body portion which serves as a guide; Actuating rods'16, 1:7 havealigned'threaded Ithreaded} engagement with and Within the g leeves lbiTheinnerends-of these'rods ter- I the figm e's' respectivelypertainingthereto. c These" discs are; carried by the shaft 9 and 35,

being on diamet ri cally opposite sides of the apiisof thev sh aft. Theshaft' ,9,,being jour-l nale'd" on the casing closure 7, is? connected Qnormally disposed 1 to have jtheir' centers alignedin: parallelism withthe. opposed! ends of the brakest rap-,jin'which position the said brakestrap is expandedoutof engagei to apply the brake upon the b'rakefldrumiThe rods 16, V17 efi'e'ctapplication ofthe' brakes by drawing thesleeves15i'nwardly" "to bring the inner ends? of these sleeves againstthe outer faces of thebifurc'ated post s outer end portions whichf'reelypass through ,the spaces that are provided between, the sides of thepostsllr and into' minate in rectangular. frames 18 and '19. rectangularframes surround the discs 2Q and 21 which are engaged'by'the sides ofeccentric with respect theretoi and with respect. to eachother,othe'centers ofth'e discs with suitable brake operating lever mechainismwofwhich a makes-and an actuating-i tease are shown, thec'rank"being fixed upon} Y the out efnd or the shaft-95am the rod beingj.fp'ivotally connected-with the outer end of: saidcrankf' When the crankis turned the shaft19 is; turned. The discs. 20" and'21 are 1% to effectthe desired contraction of the I brake strap or shoe. WVhen the discsare restored to their normal, brake releasing, posi- 7, tion, theabutment sleeves .15 are positioned by the rods whichin turnarepositionedby the discs or eccentrics thatiare surrounded n bythefr'am'es"in'whichtlie inner ends of the rods terminate. Theconnections between the endsof the brake bands or strap andthe-op-l Ycrating rods 16 and 17 are flexibleto permit said posts to movetransversely of the rods andfsleevi'es' as these rods'and sleeves aremoved along their common axis in the opera-i V,clese'thehelesinthe'casing body 6 inrwhich said sleeves are-slidinglyreceived, soas'to 'niaintain'the'dustproof charaeter'of-- thei I ing'atthis place-i. The brake strap orshoe,

is made adjustable with respect to" theiaetiiating mechanism that is tooperateit by forming the sleeves15'f wrench or Y tool engagingportions'"15 that are accessible T "from the? exterior of the casing;

The frame' 18 isdesirably slidably sup- 5 ported'lipon aish'elfflwhichisseured te tlle inner face of one'of tlieside' wallsof theeasing'bod'y6:, A fla ge'as isrinterpe's'edbetween o and is in fixedrelation"tdtliediscsQQfand-'21s i a and Serve tesupportthefraine 19i' aguard V 26 isfalso secured to the afor,esaidwall-of the casing body andcooperates Y with the-oppa site wall to prevent lateral mo vement-,thatis movement" lengthwise of the shaft 4 of the N frames. L, ,1 5 v fhileI" haveshow'n' asiiigle br ake shoe or strap having' bothends} mutually:approachable and separable'and imam-liming disc 7 Y members 20 a-nd"21;: itfis obvious 'tliat the in1. vention need not be't-hus re striet'edYY a f It wilPbe' apparent; to thoser-sainiaswah the art that thebraking mechanis -bra invention possesses novel? and advantageous'charaeteristics which arecieanyshownin the. drawingand which havemenses-rennin? the description; f Y I I Changes" may be" made withoiitdeparting from the-invention; 5 j Having thus described -my invention, Iclaim; V V g i" 1. In a braking mechanism, a brake d'rii'm,

a brake band, a cashing-enclosing the -driim and band, anabutment-mountedon each end of" the band, members slidabl-y mounted onthe casing'for cooperation with saidabiitj-'- ment" respectively whenmoved toward each other to apply the'b'and to 'thedrumsaid membersa'ndfsaid abutments having relative movement transversely o fthe me'mbers,apair of eccentrics rotatably mounted i'ri'tli e casing" between saidmembers, a connection between, each eccentrlc and a related memberresponsive to simultanebus rotatien} 'of' the eccentricsinionefdirectiohto draw the mem; V

centrics, and means for simultaneously ro-- tating the eccentrics. I

2. In a braking mechanism, a brake drum, a brake band, a casingenclosing the drum and band, an abutment mounted on each end of theband, members slidably and rotatably mounted on the casing forcooperation with said abutments respectively when moved toward eachother to a ply the band to the drum, said abutments eing movabletransversely of said members, a pair of eccentrics rotatably mounted inthe casing between said members, a connection between each eccentrio anda related member responsive to simultaneous rotation of the eccentricsin one direction to draw the members toward each other and toward saideccentrics, said connections having thread engagement m re- 7 cesses inthe members respectively to permit relative adjustment between eachconnection and its related member, and means for simultaneouslyrotatingthe eccentrics.

In witness whereof, I hereunto subscribe my name.

FRANCIS TURZICKY.

